node/test/parallel/test-cluster-worker-forced-exit.js

var assert = require('assert');
var cluster = require('cluster')
var net = require('net');

var SENTINEL = 42;

// workers forcibly exit when control channel is disconnected, if
// their .suicide flag isn't set
//
// test this by:
//
// 1 setup worker to wait a short time after disconnect, and exit
//   with a sentinel value
// 2 disconnect worker with cluster's disconnect, confirm sentinel
// 3 disconnect worker with child_process's disconnect, confirm
//   no sentinel value
if (cluster.isWorker) {
  process.on('disconnect', function(msg) {
    setTimeout(function() {
      process.exit(SENTINEL);
    }, 10);
  });
  return;
}

var unforcedOk;
var forcedOk;

process.on('exit', function() {
  assert(forcedOk);
  assert(unforcedOk);
});

checkUnforced();
checkForced();

function checkUnforced() {
  cluster.fork()
  .on('online', function() {
    this.disconnect();
  })
  .on('exit', function(status) {
    assert.equal(status, SENTINEL);
    unforcedOk = true;
  });
}

function checkForced() {
  cluster.fork()
  .on('online', function() {
    this.process.disconnect();
  })
  .on('exit', function(status) {
    assert.equal(status, 0);
    forcedOk = true;
  });
}